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onsemi NCV571SN12T1G
- Part No.:
- NCV571SN12T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCV571SN12T1G.pdf
- Description:
- IC REG LINEAR 1.2V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,757
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Product details
Overview
NCV571SN12T1G from onsemi is an automotive-grade, fixed-output low-dropout linear regulator delivering 1.2 V at up to 150 mA with ultra-low 4.0 µA typical quiescent current, 3% output voltage accuracy, and operation across −40 °C to +125 °C - designed for battery-powered instrumentation and camcorders requiring stable low-power voltage regulation.
For engineers reviewing the NCV571SN12T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage (max 450 mV at 10 mA), enable input threshold (0.3 V logic low / 1.3 V logic high), thermal shutdown protection, and AEC-Q100 qualification for automotive use.
Technical Context
The NCV571SN12T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and protection circuitry (current limit and thermal shutdown) in a single TSOP-5 package. It operates with input voltages from 0 V to 12 V and maintains regulation down to 1.2 V output with minimal headroom.
Its enable function allows external control of regulator state - pulling Enable low disables output and reduces ground current to ≤0.1 µA, while connecting Enable to Vin enables operation. The device is stable with 0.1 µF ceramic output capacitors and requires no minimum load current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±3% at 10 mA (±4% over full temperature range), enabling precise core supply for low-voltage microcontrollers. |
| Max Input Voltage | 12 V - supports direct connection to automotive 12 V rail or multi-cell Li-ion battery systems without pre-regulation. |
| Dropout Voltage | 450 mV max at 10 mA (measured at Vout −3%) - ensures regulation even when input drops to 1.65 V, critical for battery discharge scenarios. |
| Quiescent Current | 4.0 µA typical (≤8.0 µA max) - extends battery life in always-on monitoring circuits and sleep-mode subsystems. |
| Enable Threshold | VTH(HI) = 1.3 V, VTH(LO) = 0.3 V - compatible with 1.8 V/3.3 V logic without level-shifting in automotive body control modules. |
| Operating Temp | −40 °C to +125 °C - qualified per AEC-Q100 Grade 1, suitable for under-hood and infotainment power rails. |
| Output Current | 150 mA continuous - sufficient for powering sensors, RF transceivers, or small FPGA I/O banks in compact automotive ECUs. |
Pinout & Package
NCV571SN12T1G is housed in a Pb-free TSOP-5 surface-mount package (3.00 × 1.50 × 0.95 mm, 0.95 mm pitch), optimized for space-constrained automotive PCBs and thermally enhanced with exposed pad grounding capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vout | Regulated 1.2 V output - connect directly to load; requires ≥0.1 µF ceramic capacitor placed adjacent to pin. |
| 2 | GND | Power ground reference - must be low-impedance; tie to PCB ground plane and connect exposed pad if present. |
| 3 | Enable | Active-high digital control input - pull to Vin to enable, to GND to disable; internal pull-down not provided. |
| 4 | NC | No internal connection - recommended to connect to GND to reduce noise coupling and improve thermal dissipation. |
| 5 | Vin | Input supply (0–12 V) - route with wide copper traces; place 0.1 µF decoupling capacitor within 2 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 4.0 µA typical enables >1-year battery life in 10 µA standby systems using coin cells or small Li-ion packs. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including engine control, ADAS sensors, and body electronics with full PPAP support. |
| Stable with 0.1 µF ceramic output cap | Eliminates need for tantalum or high-ESR capacitors - reduces BOM cost and improves reliability in temperature-cycling environments. |
| Thermal shutdown & current limit | Protects against short-circuit faults and PCB overheating without external components - essential for unattended automotive modules. |
| Low dropout at light loads | 730 mV typical dropout at 10 mA (1.2 V output) preserves headroom in low-power sensor nodes during cold-cranking events. |
Applications
| Automotive Camera Module Power | Industrial Handheld Scanner |
|---|---|
Use Scenario: Powers image sensor and ISP in rear-view or surround-view cameras mounted in vehicle exteriors. IC Role / Device Role / Timing Role: Primary 1.2 V core regulator supplying digital logic and analog front-end blocks. Use Value: AEC-Q100 qualification and −40 °C to +125 °C operation ensure reliable startup and video stability across all ambient conditions. |
Use Scenario: Supplies 1.2 V to ARM Cortex-M4 MCU and CMOS barcode imager in portable industrial scanners. IC Role / Device Role / Timing Role: Low-noise, low-IQ LDO providing clean core voltage during intermittent scan bursts and deep-sleep modes. Use Value: 4.0 µA quiescent current extends single-charge battery life beyond 6 months in warehouse logistics deployments. |
| Medical Portable Monitor | Telematics Control Unit (TCU) |
Use Scenario: Regulates 1.2 V for low-power ECG signal processor and Bluetooth LE radio in wearable patient monitors. IC Role / Device Role / Timing Role: Always-on voltage source maintaining real-time sampling integrity during battery-only operation. Use Value: 3% output accuracy and <100 ppm/°C tempco ensure consistent ADC reference performance across clinical operating environments. |
Use Scenario: Provides 1.2 V to cellular modem baseband processor and GNSS receiver in automotive telematics gateways. IC Role / Device Role / Timing Role: Secondary LDO supporting high-speed data processing cores alongside main 3.3 V rail. Use Value: Enable pin allows synchronized power sequencing with CAN controller wake-up signals, reducing system-level leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8170DS120MNTXG | 1.2 V, 300 mA, 2.5 µA IQ, DFN-6 (2×2 mm); higher current but larger footprint and no TSOP-5 option. | Supports higher-current SoCs; lacks identical thermal resistance (RJA = 190 °C/W vs. TSOP-5's 250 °C/W). | Choose when >150 mA load or lower IQ is required, and board layout permits DFN-6 placement. |
| TLV73312PDBVR | 1.2 V, 300 mA, 35 µA IQ, SOT-23-5; higher quiescent current, wider input range (1.4–5.5 V), no AEC-Q100 rating. | Not automotive-qualified; unsuitable for under-hood or safety-critical modules requiring PPAP documentation. | Acceptable for non-automotive portable instruments where AEC-Q100 is not mandated and 35 µA IQ is acceptable. |
Compared with NCV571SN12T1G, NCV8170DS120MNTXG offers higher output current and lower IQ but requires rework for TSOP-5-to-DFN conversion, while TLV73312PDBVR trades AEC-Q100 compliance and ultra-low IQ for broader input flexibility in commercial designs.
Availability
NCV571SN12T1G is available at Aetrix Electronics and suitable for automotive camera modules, industrial handheld scanners, and medical portable monitors requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for NCV571SN12T1G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV571 series belongs to onsemi's automotive-qualified LDO portfolio, engineered specifically for low-power, high-reliability subsystems in vehicles - emphasizing ultra-low quiescent current, extended temperature operation, and robust fault protection.
FAQ
What is the maximum input voltage rating for the NCV571SN12T1G?
The NCV571SN12T1G has a maximum input voltage rating of 12 V, as specified in the Absolute Maximum Ratings table. This allows direct integration into standard 12 V automotive electrical systems and multi-cell battery applications without external pre-regulation. Exceeding 12 V may damage the device, and operation above this value is not guaranteed or supported.
Does the NCV571SN12T1G require an external pull-up resistor on the Enable pin?
No, the NCV571SN12T1G does not include an internal pull-up on the Enable pin. If the Enable function is unused, the pin must be externally connected to Vin to ensure regulator operation - leaving it floating is not recommended due to potential instability or unintended disable behavior. When actively controlled, a logic-level signal meeting VTH(HI) ≥ 1.3 V and VTH(LO) ≤ 0.3 V is required.
Is the NCV571SN12T1G pin-compatible with other variants in the NCP571/NCV571 family?
Yes - all TSOP-5 variants (e.g., NCP571SN12T1G, NCV571SN08T1G) share identical pinout and package dimensions. The NCV571SN12T1G uses pins 1 (Vout), 2 (GND), 3 (Enable), 4 (NC), and 5 (Vin), matching the TSOP-5 footprint defined in the datasheet. This allows drop-in replacement across output voltage versions when board layout accommodates the same marking and thermal constraints.
What is the minimum output capacitance required for stable operation of the NCV571SN12T1G?
The NCV571SN12T1G requires a minimum output capacitance of 0.1 µF, as confirmed in the datasheet's "Typical Applications" section and Electrical Characteristics table. Ceramic capacitors are recommended and fully supported; larger values improve transient response and noise rejection without risk of instability. No ESR requirements apply, simplifying capacitor selection.
How does the thermal performance of the NCV571SN12T1G compare between TSOP-5 and DFN6 packages?
The TSOP-5 package used by the NCV571SN12T1G has a junction-to-ambient thermal resistance (RJA) of 250 °C/W under standard test conditions (1 oz copper, 100 mm² spread area), while the DFN6 variant achieves 190 °C/W. This means the TSOP-5 version dissipates less power before reaching thermal shutdown - design margins must account for this difference when sizing PCB copper area or selecting ambient operating conditions.
NCV571SN12T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 10mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 8 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCV571SN12T1G FAQ
1.How can I place an order for NCV571SN12T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV571SN12T1G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NCV571SN12T1G reliable?
The price and inventory of NCV571SN12T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV571SN12T1G is usually 5 days.
3.What payment methods are accepted for NCV571SN12T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV571SN12T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV571SN12T1G?
NCV571SN12T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV571SN12T1G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NCV571SN12T1G?
For technical support, including NCV571SN12T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV571SN12T1G requirements.
6.How does Aetrix verify that NCV571SN12T1G is sourced from the original manufacturer or authorized distributors?
All NCV571SN12T1G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NCV571SN12T1G meets industry standards.
7.What is the process for return or replacement of NCV571SN12T1G?
All NCV571SN12T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV571SN12T1G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NCV571SN12T1G part is unused and in its original packaging.
Return procedure for NCV571SN12T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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